Multipart initiation stored client-supplied Seaweed-X-Amz-Acl and
Seaweed-X-Amz-Owner request headers onto the upload entry, and
CompleteMultipartUpload copied them to the finished object, letting a
caller forge ownership or a public ACL without s3:PutObjectAcl.
Generated with [Devin](https://devin.ai)
Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>